20 Sunnyside Avenue is located in the charming downtown district of Mill Valley in southern Marin County. Nestled at the foot of Mount Tamalpais and extending to the marshland surrounding Richardson Bay, Mill Valley has the charm of a small European village that’s an equal draw for hikers and runners, musicians and artists, foodies and fashionistas, and moms and dads with strollers. The property is located 14 miles north of San Francisco via the Golden Gate Bridge. Mill Valley’s vibrant business districts offer a variety of shopping delights, from one-of-a-kind boutique clothing shops, salons and yoga studios to pet stores. Mill Valley has the best selection of restaurants per square mile in Marin - you can find everything from top-rated chops, to local craft beer, artisan coffee, handmade pizzas, freshly baked bread, gourmet burgers and more!